BOG SPAVIN. 



328 



and bandaging with cotton wadding will be the best tieatment at 

 tirst. The aft'eetion (sjilints or sprain tVir instance) which gives 

 rise to the windgall, should be speciall}' treated. 



Bog Spavin. 



This a[ipears as a soft swelling to the front and to the inner side 

 of the hock joint. Its position, which is indieated by a, dotted line 

 in Fig. 128, is higher up than the seat of bone s]iavin. A com- 



Fig. 129. — I-'iont view uf 

 near hock. 



Fig. 130. — Rear view ui 

 near Irock. 



parison between Figs. 131 and 132 shows the exact sjiot at whieli 

 we should look for bog spavin. 



ANATOMY. — This ailment is a distended condition of the synovia! mem- 

 brane of the capsular ligament of the true hock joint — that which is formed 

 by the tibia and astragalus (Fig. 98) — and lies between the base of the 

 astragalus and the internal lateral prominence (the malleolus) of the tibia. 

 "It shows itself at the inner side of the joint, because here the ligaments 

 are wider apart, and there is more room for distension" (Sinvehcnge). It 

 is soft and elastic, and extends up and down the inner front of the joint for 

 about four inches, or more, as the case may be. 



Bog spavins often exist without any syinptum of iiitbinimation. 

 This affection seldom impairs the usefulness of the animal and is 



21* 



